The Picasso triggerfish (Rhinecanthus aculeatus) is a species of marine blowfish. It inhabits coral reefs and is kept in aquariums. The body of the fish has a multicolored arrangement of streaks and spots reminiscent of Pablo Picasso's sketches, hence the usual species epithet. Picasso's Triggerfish has been used in studies of color vision in fish. ¹⁾